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微合金化對U-Co金屬玻璃形成能力的影響
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中國工程物理研究院材料研究所,中國工程物理研究院材料研究所,中國工程物理研究院材料研究所,中國工程物理研究院材料研究所,中國工程物理研究院材料研究所,大連理工大學材料科學與工程學院三束材料改性教育部重點實驗室

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TG13

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國防基礎預研項目(項目號B1520133007)和中國工程物理研究院科技發(fā)展(項目號2013A0301015)資助.


Effect of Minor Alloying on the Glass Forming Ability of U-Co Alloy
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Institute of Materials,China Academy of Engineering Physics,POBox,Institute of Materials,China Academy of Engineering Physics,POBox,Institute of Materials,China Academy of Engineering Physics,POBox,Institute of Materials,China Academy of Engineering Physics,POBox,Institute of Materials,China Academy of Engineering Physics,POBox,?Key Laboratory of Materials Modification by Laser,Ion,and Electron Beams Ministry of Education,School of Materials Science and Engineering,Dalian University of Technology

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    摘要:

    U-Co系具有較寬非晶成分區(qū)間，但其玻璃形成能力（GFA）較差。本文針對該體系的U69.2Co30.8合金，選擇不同類型的元素M（M=Sn、Si、Be、Cu、Pd、Y與Zr）進行微合金化，采用銅輥甩帶方法制備U69Co30M1非晶合金條帶樣品，結合X射線衍射與差示掃描量熱技術研究了微合金化對合金GFA的影響。結果表明，Sn添加對U-Co合金的GFA具有明顯改善作用，Si次之，Be、Cu影響不大，Pd、Y、Zr起到惡化效果。結合合金熔化行為的改變和GFA與M元素的熔點、電負性、原子尺寸及M-C混合焓等參數(shù)的關聯(lián)性分析，初步揭示出微合金化對U-Co合金GFA的影響機制，其本質應該與改變合金液體穩(wěn)定性和晶化驅動力有關。

    Abstract:

    Minor alloying is a useful approach for promoting glass forming ability (GFA) of metallic glasses. U-Co metallic glasses can be achieved in a wide composition range, but their GFAs are very poor. This study is aimed to increase the GFA in U-Co system by minor alloying. Sn, Si, Be, Cu, Pd, Y and Zr were selected as different-typed minor alloying elements in U69.2Co30.8 alloy. The glassy U69Co30M1 (M=Sn, Si, Be, Cu, Pd, Y, Zr) ribbon samples were prepared by melt-spinning with a copper roller, and their phase formation and thermodynamics were investigated by X-ray diffraction (XRD) and differential scanning calorimetry (DSC) techniques. The results indicate that, Sn element significantly improves the GFA, Si displays the second improvement, Be and Cu are slightly effective while Pd, Y and Zr deteriorate the GFA. Based on the combination of the melting behavior change reflected by the DSC result, and the relationship between the GFA and the melting temperatures, electro-negativities, atomic sizes of M elements as well as mixing-enthalpies of M-C, the effect of the minor alloying on the GFA in U-Co system should be attributed to the variation of both metallic liquid stability and the crystallization driving force.

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黃火根,柯海波,劉天偉,張鵬國,唐縣娥,王英敏.微合金化對U-Co金屬玻璃形成能力的影響[J].稀有金屬材料與工程,2018,47(3):990~994.[Huang Huogen, Ke Haibo, Liu Tianwei, Zhang Pengguo, Tang Xiane, Wang Yingmin. Effect of Minor Alloying on the Glass Forming Ability of U-Co Alloy[J]. Rare Metal Materials and Engineering,2018,47(3):990~994.]
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  • 收稿日期:2016-01-19
  • 最后修改日期:2016-04-20
  • 錄用日期:2016-05-19
  • 在線發(fā)布日期: 2018-04-11
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